Only one thing can be done.
Ask god to reverse the time or move on with 2021 and prepare for the best with all the relevant information handy!

Hello

XAT is conducted by XLRI Jamshedpur. It is an MBA entrance test, most popular along with CAT.

The exam date for XAT exam is January 03, 2021. It is too late now to make any changes in the application form. The registration Dates of XAT 2021 was over on 10th December 2020.

For more details you can click on https://bschool.careers360.com/articles/xat-registration